The low power bug never seems to get fixed. Sony, really, do you believe the world is only full of IEM and quiet playback listeners? Forgive me Sony fans, as I'm a fan, just a fan sick of these pitiful power levels. Give us some power Sony so I can but your awesome sounding devices. Rant over.

I think my smartphone plays louder (z1 compact)
Can't understand these SQ adjustments like "Clear Audio" & "DSEE HX" or "Clear Stereo". As I thought about my self as an audiophile, I believed that players must play the records as they been recorded without adding any extra notes here or there. For me these adjustments are useless.

Any way, could you guys recommend me some in ear monitors, that you have tried with zx100. Would be grateful for any advice or your experience.
Thank you...

Having same issue...sooner or later replacing my A17 with the Questyle. It sounds unbelievable.... The scrollwheel is a joke, the UI is a nightmare, battery life just 10 hours tops...But it so much matches my personal preferences in terms of sound signature....